Add more dependencies of ShaderFileLoader into unit test

Actually calling the parseFiles() method generates code which requires
additional dependencies. Some of these are added as .cpp files in the Makefile,
while the call to GetTextureManager() is linked to a local implementation so we
can avoid depending on the modulesystem.

radiant/Makefile.am

@@ -455,5 +455,8 @@ facePlaneTest_SOURCES = test/facePlaneTest.cpp \
                         brush/FacePlane.cpp
 facePlaneTest_LDADD = $(top_builddir)/libs/math/libmath.la
 
-vfsTest_SOURCES = test/vfsTest.cpp $(VFS_SOURCES)
+vfsTest_SOURCES = test/vfsTest.cpp $(VFS_SOURCES) \
+                  shaders/Doom3ShaderLayer.cpp \
+                  shaders/TableDefinition.cpp \
+                  shaders/textures/GLTextureManager.cpp
 vfsTest_LDFLAGS = $(FILESYSTEM_LIBS) $(Z_LIBS)

radiant/test/vfsTest.cpp

@@ -3,6 +3,7 @@
 
 #include "radiant/vfs/Doom3FileSystem.h"
 #include "radiant/shaders/ShaderFileLoader.h"
+#include "radiant/shaders/textures/GLTextureManager.h"
 
 struct VFSFixture
 {
@@ -100,14 +101,35 @@ BOOST_FIXTURE_TEST_CASE(handleAssetsLst, VFSFixture)
     BOOST_TEST(fileVis.count("assets.lst") == 0);
 }
 
+namespace shaders
+{
+
+// Provide a local implementation of GetTextureManager since the application
+// version calls the module registry.
+GLTextureManager& GetTextureManager()
+{
+    static GLTextureManager manager;
+    return manager;
+}
+
+}
+
 using namespace shaders;
 
+// Replacement for ShaderLibrary used in tests
 struct MockShaderLibrary
 {
+    bool addTableDefinition(const TableDefinitionPtr& def)
+    { return true; }
+
+    bool addDefinition(const std::string& name, const ShaderDefinition& def)
+    { return true; }
 };
 
 BOOST_FIXTURE_TEST_CASE(loaderShaderFiles, VFSFixture)
 {
     MockShaderLibrary library;
     shaders::ShaderFileLoader<MockShaderLibrary> loader("materials", library);
+
+    loader.parseFiles();
 }